William e



w; R.. BARTO;

Paten'tedi'Dlec. 14,1880`I UNITED STATES PATENT OFFICE.

WILLIAM R. BARTON, OF BRIDGEWATER, MASS., ASSIGNOR OF ONE-HALE` TO GEORGE O. HAMMOND, OF PAWTUCKET, R. I.

WELT-TRI MM ER.

SPECIFICATION forming' part of Letters Patent No. 235,493, dated December 14, 1880.

Application filed August 14, 1880. (Model.)

To all 'whom tt may concern:

Be it known that I, WILLIAM R. BARTON, of Bridgewater, in 'the .county of Plymouth and State of Massachusetts, have invented a new and valuable Improvement in Seam-Welt Trimmers and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation' of a perspective view of this instrument. Fig. 2 is a top view. Fig. 3 is a bottom view. Fig. 4 is a side view of the shank and its headbranch. Fig. 5 is a sideiview of the remova- 'nected to a handle, B. On the end of the shank is formed one branch, O, of the head, having a curved half-creseent form, somewhat obliquely arranged with reference to the direction of 'the shank, as shown in the drawings. This branch C of the head is constructed with la shoulder, a, at theend of the shank, and a bearing-shoulder, b, in the direction of the shank, and offset from the guard-wall c, in which is made a straight groove, d, along the shoulder, and extending ,to the guard-point e, the outer edge, f, of which is heveled and extends obliquely across the end of the groove, as shown. The end of the guard is rounded and beveled on the inside outward in a flaring vabove in reference to the rigid portion of the head.

The blade 7a is a long thin slip of steel with parallel edges, which are seated in the grooves d, which are opposite to each other when the removable portion E is secured to the fixed branch D of the head. The steel blade extends through the head along the shank in rear, and in front along and between the bearings b and b', whereby it is securely held. The under shoulder, b', is usually made somewhat longer than the upper shoulder, extending` nearer to the point portion, so that the blade will have a bearing near its cutting extremity z. Along the back rounded portion, m, of the head a central groove, a, is made, the walls of which form running edges 8, of somewhat acute form, heveled on their outer surfaces at f, and serving to guide the head in the seam, the Welt being received in the intermediate groove.

The branch E of the head can be easily loosened, so that the blade can be removed or adjusted nearer to or farther from the guard points and edges of the head, to cut deep or shallow when brought against the Welt.

In sharpening, the blade is designed to be pushed forward clear of the guard in front, so that the guard portion of the head will not be worn or injured, and will therefore be always in good shape, not wearing or cutting the upper when in use.

The blade is heveled on its upper side at the cutting extremity, and its edges are formed square to fit neatl)T in the grooves d of the head, which are also squaredand hold the blade firmly. The guard-points are designed to extend somewhat in front of the cuttingedge, as shown.

I am aware that a welt-trimmer having a fixed jaw and a clamping-jaw secured together by a screw has been used to clamp the knife and hold it in position; but in the instance referred to (Patent No. 8,802, March 23, 1869) the inner faces of the jaws are plain, and the knife is passed through a recess in the rear end of the elamping-jaw. In mine the straight bearing-shoulders b b' and the grooves extendin g thence to the points e e hold the knife and a groove, d, above the shoulder b', the setscrew l), and a knife, k, clamped between the 15 Shoulders b b', and having the edges resting in the grooves d d, substantially as and for the purposes set forth.

In testiinony that I claim the above I have hereunto subscribed my name in the presence zo as rigidly as if it were fixed in the head of the tool.

Having thus fully described my invention, what I claim is- Iu a Welt-trinimer, the combination of the branch C, secured to the shank A. and 1ro vided With the elongated otfset bearing-shoul- WILLIAM RANDAL BARTON.

'itnesses:

GEORGE U. HAMMOND, WILLIAM E. BARTON. 

